// Copyright (C) Kumo inc. and its affiliates.
// Author: Jeff.li lijippy@163.com
// All rights reserved.
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published
// by the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program.  If not, see <https://www.gnu.org/licenses/>.
//


#pragma once

#include <pollux/common/base/random_util.h>
#include <pollux/vector/lazy_vector.h>

#include <cstdint>

namespace kumo::pollux::dwio::common {
    /// Top row level mutations.
    struct Mutation {
        /// Bit masks for row numbers to be deleted.
        const uint64_t *deletedRows = nullptr;

        random::RandomSkipTracker *randomSkip = nullptr;
    };

    inline bool hasDeletion(const Mutation *mutation) {
        return mutation && (mutation->deletedRows || mutation->randomSkip);
    }

    class DeltaColumnUpdater {
    public:
        virtual ~DeltaColumnUpdater() = default;

        /// Update the values in `result' to reflect the delta updates on `baseRows'.
        /// `baseRows' are the rows starting from the beginning of the current scan
        /// (so that the delta readers can use this to choose which lines to read as
        /// well), not based on the positions in `result'.
        virtual void update(const RowSet &baseRows, VectorPtr &result) = 0;
    };
} // namespace kumo::pollux::dwio::common
